I guess I wasn't sure what your point was either (on author vs. automatic). Just forget that comment then.
Anyway, we do have this rule in the regions spec that the last container behaves as a regular div, not producing a page break. I don't know why we want that, but I want to make sure it is possible to turn it off. Otherwise script that adds pages as needed will be complicated, slow, messy or all of the above.
My preference is to just not have this special last-page behavior. I can be convinced otherwise, but so far I have not seen a compelling use case.
Alex
> -----Original Message-----
> From: Tab Atkins Jr. [mailto:jackalmage@gmail.com]
> Sent: Thursday, May 12, 2011 10:54 AM
> To: Alex Mogilevsky
> Cc: Vincent Hardy (vhardy@adobe.com); www-style@w3.org CSS
> Subject: Re: [css3-regions] more feedback
>
> On Thu, May 12, 2011 at 10:05 AM, Alex Mogilevsky <alexmog@microsoft.com>
> wrote:
>
> > I suppose you can consider scripted regions are also "added
> automatically by UA" if that's an important distinction...
>
> Hmm, I don't understand what your point is. Yes, authors can create
> additional containers via script. Excess content will then flow into the
> new containers.
>
> Your two scenarios aren't actually all there is - you can instead just
> make the final container suitable for absorbing arbitrary content, like
> making it a multicol element.
>
> ~TJ